s905 - hdmi handshake /color space problem with older TVs

**mmpp** · March 12, 2017 at 7:59 AM

What "black screen" are you talking about? Please describe the problem further - it does not happen here.

You might want to

change hdmi cable and tv hdmi socket to test for a bad connection
put a little pressure on the hdmi plug in your android box (with a small rubber band or some weight) - there are quite a few reports of badly soldered hdmi sockets
check the kodi settings for "adjust output frequency" and set them to "at stop/start" and add a time delay of 2-3 seconds so your old tv can catch up with the frequency change

Alex31 · April 13, 2017 at 12:09 PM

Everything is working great now for several weeks

But i have one issue,
When i turn of Kodi 17 the X96 box is shutting down but also my Tv is shutting down.....
Is there a fix or another way to prevent shutting down my tv
Thanks............

**mmpp** · April 13, 2017 at 12:24 PM

Please check the settings for cec, you find them in system-input, if I remember correctly.

Alex31 · April 13, 2017 at 12:39 PM

U mean Cec setting in Android, i need to start te X96 box wihout the sd with LibreElec on it?
Then cec off?

Tim_Taylor · April 13, 2017 at 12:39 PM

Quote from Alex31

U mean Cec setting in Android, i need to start te X96 box wihout the sd with LibreElec on it?
Then cec off?

CEC settings in LE

Alex31 · April 13, 2017 at 12:57 PM

Where can i find these setting in LibreElec?

b_ignatov · May 29, 2017 at 9:37 PM

Thank you for the great solution!!

I am so happy that I fixed my problem too, but I have a question.

If I have 2 commands in my autostart.sh, how to separate them?I have a command to mount my NAS to my Android Box and another one to fix this issue.My autostar.sh looks like that, but I'am not sure that the second command is OK

Bash

#!/bin/sh
 ( mount -t cifs -o username=root,password=libreelec,rw //192.168.0.1/home /storage/recordings;
 echo 1 > /sys/class/amhdmitx/amhdmitx0/output_rgb
 ) &

Thanks in advance.

jazia · May 30, 2017 at 11:00 AM

hi everyone,

i'm fighting against this problem (color space for old tv) since far, can anyone help me?

i have a tv box with an s905x and i'm using libreELEC 8 on USB, can anyone tell me what should i do to apply the patch (or if there is a patch for veriosn 8). I never applied a patch on libreELEC nor in android so i need a little more help

ukdaveuk · November 3, 2017 at 10:13 AM

Does anyone know if this works in the latest version 8.2.0.1. The notes say rgb mode doesn’t work

**mmpp** · November 3, 2017 at 11:23 AM

As the note says: No, it does not work.

miwenka · November 30, 2017 at 8:43 AM

Quote from ukdaveuk

Does anyone know if this works in the latest version 8.2.0.1. The notes say rgb mode doesn’t work

Quote from kszaq

Switching to RGB 10bit mode should be possible by echo 'rgb,10bit' > /sys/class/amhdmitx/amhdmitx0/attr

This is also not working on LibreELEC 8.2 for S905/S905D/S905X ?

PS. I have old Philips TV with rgb force problem.

**mmpp** · November 30, 2017 at 9:23 AM

Use LibreElec 8.1 and

Code

 echo 1 > /sys/class/amhdmitx/amhdmitx0/output_rgb

with your old Philips TV.

**kszaq** · December 5, 2017 at 7:21 PM

I borrowed some kernel commits from Sam (OSMC) that supposedly fix RGB mode for Philips TVs. Please test.

This is an update from 8.2 branch so you either have to already be running 8.1.x/8.2.x or remember to use a device tree for 8.2 branch!

S905/S905X: LibreELEC-S905.arm-8.2-devel-20171205194914-r26441-gdba9a67.tar

S912: LibreELEC-S912.arm-8.2-devel-20171205200850-r26441-gdba9a67.tar

Fredouye · December 6, 2017 at 6:10 PM

I tested this build on a KDL-40BX400 Sony TV set, and got the pink/green screen a few minutes after booting

Fredouye · December 6, 2017 at 6:20 PM

Well, I may have missed a step...

Code

# cat /sys/class/amhdmitx/amhdmitx0/dc_cap 
444,8bit
422,8bit
rgb,8bit
# echo 'rgb,8bit' > /sys/class/amhdmitx/amhdmitx0/attr

I'll do some more testing and will let you know.

Edit : same issue after a few minutes.

**kszaq** · December 6, 2017 at 7:52 PM

Fredouye Thank you for testing. This is not good news.

Harmonia · December 6, 2017 at 8:44 PM

Hello,

which is the last version where:

echo 1 > /sys/class/amhdmitx/amhdmitx0/output_rgb

works?

This one: 7.0.3.012?

I also have an old TV with a handshake problem.

This version does not work anymore:

LibreELEC-S905.arm-8.2-8.1.10.img

Fredouye · December 7, 2017 at 6:21 AM

IIRC, you can use 7.0.3 and 8.0